"We are taking a brief break so I can focus on myself," Lohan said Monday.

The breakup comes after a long weekend of fighting between the couple that began when Lohan was denied entry to a Ronson-held party on Friday. Sources saw a locksmith at Ronson's house Saturday, fueling speculation that the 31-year-old DJ was taking measures to keep Lohan out of her home.

The Ronson family filed for a restraining order Monday that was reportedly meant for Lohan, 22, but police sources wouldn't say who the papers referenced, Us magazine reported.

The couple have been dating on and off for over a year and in recent months have been inseparable. Lohan rarely misses one of Ronson's DJ-ing gigs, and the two have reportedly been shacking up together in Ronson's home for some time.

Ronson is taking the breakup in stride -- "the aura in pleasanton is very pleasant," she wrote on her MySpace page Monday.

Lindsay Lohan's Highs and Lows

Lohan is currently in Los Angeles, living with her family and looking for acting work, E! Online reported.